20-10. V. COM adjustment
Purpose :Adjusts for correct voltage of the DC biasLCD sizeLCD board
voltage of the common electrode signal of the
Type 1PD-74/SD-24
LCD panel.2.5 inch (PAL only)
Adjustment Error :Details of the LCD picture will be lost.Type 2PD-75/SD-25
Flicker occurs easily. Vertical stripes willType 33.0 inch (NTSC)PD-77
appear.Type 43.5 inch (NTSC/PAL)PD-76
ModePlayback PAUSENo mark : Type 1, Type 4
á n : Type 2, Type 3
SignalAlignment tape: color bar for
operation check segment
WR5-4CL (PAL)
WR5-4NL (NTSC)
Measurement point
To be confirmed on LCD display
Measuring equipment
Adjustment pageF
Adjustment addressDF
Adjustment procedure:
OrderPageAddressDataProcedure
160001After setting the data, press the PAUSE button. (Preparation)
2Establish the PB PAUSE state using operation keys of the camera.
3FDFChange data using the PLAY and STOP buttons of the adjustment remote commander and
observe the noise bar portion. Find the noise bar showing noise similar to head clogging.
Keep pressing the PLAY button until black dots can be seen clearly. This data is DA. Then
keep pressing the STOP button until black dots can be seen clearly. This data is DB.
4Convert the DA and DB to the decimal value which are DA' and DB'. (Use page 6-13
áHow to convert the hexadecimal number to decimal numbern or OHexadecimal-Decimal
Conversion Table�.)
Then calculate DC' using the equation
DC'= (DA' + DB') ¸ 2
5FDFSet data to DC and press the PAUSE button.
660000After setting the data, press the PAUSE button. (End)
Note :This adjustment must be executed after the BRIGHT and
CONTRAST adjustments are completed.
When the data is
increased from the
initial value.Noise bar
Enlarged
Pattern as if
head clog occurs.
When the data is
decreased from the
initial value.
6-41 |
ACEC
